import sys
input = sys.stdin.readline

mod=998244353

from functools import lru_cache
@lru_cache(maxsize=None)
def calc(a,b,X,k):
    if a==0 and b==0:
        if X==0:
            return 1
        else:
            return 0
    ANS=0

    for i in range(10):
        for j in range(10):
            if i<=a and j<=b:
                if i+j+k>=10:
                    ANS+=calc((a-i)//10,(b-j)//10,X-1,1)
                else:
                    ANS+=calc((a-i)//10,(b-j)//10,X,0)

                ANS%=mod

    return ANS


T=int(input())

for tests in range(T):
    N,X=map(int,input().split())

    print(calc(N,N,X,0)%mod)